#ifndef _WX_MATH_H_
#define _WX_MATH_H_

#include "wx/defs.h"

#include <math.h>

#ifndef M_PI
#define M_PI 3.1415926535897932384626433832795
#endif

/* Scaling factors for various unit conversions */
#ifndef METRIC_CONVERSION_CONSTANT
#define METRIC_CONVERSION_CONSTANT 0.0393700787
#endif

#ifndef mm2inches
#define mm2inches (METRIC_CONVERSION_CONSTANT)
#endif

#ifndef inches2mm
#define inches2mm (1/(mm2inches))
#endif

#ifndef mm2twips
#define mm2twips (METRIC_CONVERSION_CONSTANT*1440)
#endif

#ifndef twips2mm
#define twips2mm (1/(mm2twips))
#endif

#ifndef mm2pt
#define mm2pt (METRIC_CONVERSION_CONSTANT*72)
#endif

#ifndef pt2mm
#define pt2mm (1/(mm2pt))
#endif


/* unknown __VISAGECC__, __SYMANTECCC__ */

#if defined(__VISUALC__) || defined(__BORLANDC__) || defined(__WATCOMC__)
#include <float.h>
#define wxFinite(x) _finite(x)
#elif defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \
defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \
defined(__HPUX__)||defined(__MWERKS__)
#define wxFinite(x) finite(x)
#else
#define wxFinite(x) ((x) == (x))
#endif


#if defined(__VISUALC__)||defined(__BORLAND__)
#define wxIsNaN(x) _isnan(x)
#elif defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \
defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \
defined(__HPUX__)||defined(__MWERKS__)
#define wxIsNaN(x) isnan(x)
#else
#define wxIsNaN(x) ((x) != (x))
#endif

#ifdef __cplusplus

#ifdef __INTELC__

inline bool wxIsSameDouble( double x, double y ) {
  // VZ: this warning, given for operators==() and !=() is not wrong, as ==
  //     shouldn't be used with doubles, but we get too many of them and
  //     removing these operators is probably not a good idea
  //
  //     Maybe we should alway compare doubles up to some "epsilon" precision
#pragma warning(push)
  // floating-point equality and inequality comparisons are unreliable
#pragma warning(disable: 1572)
  return x == y;
#pragma warning(pop)
}

#else /* !__INTELC__ */

inline bool wxIsSameDouble( double x, double y ) { return x == y; }

#endif /* __INTELC__/!__INTELC__ */

inline bool wxIsNullDouble( double x ) { return wxIsSameDouble( x, 0. ); }

inline int wxRound( double x ) {
  #if defined(HAVE_ROUND)
  return int( round( x ) );
  #else
  return ( int )( x < 0 ? x - 0.5 : x + 0.5 );
  #endif
}
#endif /* __cplusplus */


#if defined(__WXMSW__) && !defined(__WXWINCE__)
#define wxMulDivInt32( a , b , c ) ::MulDiv( a , b , c )
#elif defined( __WXMAC__ )
#define wxMulDivInt32( a , b , c ) ( (wxInt32) ( ( (wxInt64)(a) * (wxInt64)(b) ) / (wxInt64)(c) ) )
#else
#define wxMulDivInt32( a , b , c ) ((wxInt32)((a)*(((wxDouble)b)/((wxDouble)c))))
#endif

#if wxUSE_APPLE_IEEE
#ifdef __cplusplus
extern "C" {
#endif
/* functions from common/extended.c */
wxFloat64 ConvertFromIeeeExtended( const wxInt8 *bytes );
void ConvertToIeeeExtended( wxFloat64 num, wxInt8 *bytes );
#ifdef __cplusplus
}
#endif
#endif /* wxUSE_APPLE_IEEE */


#endif /* _WX_MATH_H_ */
